services:
  postgres:
    image: postgres:${POSTGRES_VERSION:-17.4-alpine3.21}
    container_name: postgres 
    restart: always
    user: "${UID:-0}"
    environment:
      POSTGRES_USER: ${POSTGRES_USER:-postgres}
      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-changeme} 
    volumes:
      - pg_data:/var/lib/postgresql/data                             # Postgres data
      - /home/${CONTEXT}/sockets/postgresql:/var/run/postgresql     # Postgres socket
    deploy:
      resources:
        limits:
          cpus: "${POSTGRES_CPU:-0.5}"
          memory: "${POSTGRES_RAM:-0.5G}" 
    networks:
      - default
    healthcheck:
      test: ['CMD-SHELL', 'pg_isready -U postgres']
      interval: 1s
      timeout: 5s
      retries: 10

networks:
  default:
    driver: bridge

volumes:
  pg_data:
    driver: local